Numéro : 2634 - Year : 2013
Fatigue and meteo on large containerships
Mathieu RENAUD, CMASHIPS – Marseille
Eymeric DE LORGERIL, CMASHIPS – Marseille
Jean-Baptiste BOUTILLIER, CMASHIPS – Marseille
Ludovic GERARD, CMASHIPS – Marseille
The growth of global container shipping has seen the emergence of larger and larger vessels that are currently able to load 16000 TEUs and measure almost 400 meters long. The structure of such ship has low natural frequencies that are close to wave frequencies of some sea states. Thus, the dynamic response cannot anymore be ignored in the calculation of the hull’s fatigue.
In 2006, the CMA CGM Rigoletto, containership of 9400 EVP, has been instrumented with accelerometers, strain gauges and sea state sensor in order to know better the dynamic behavior of large containerships. Thanks to this measurement campaign, the cumulated fatigue since the ship delivery from the shipyard has been calculated and the sea state met during his exploitation has been estimated. The goal of this study is to establish the link between the fatigue of the ship and the weather met during operational conditions. An experimental method has been developed to calculate the fatigue of the ship based on the historic of sea states met. The fatigue damage is mainly caused by some special events. Linking Asia to Europe, the cumulated fatigue damage of the CMA CGM Rigoletto seems to not be a structural problem contrary to a ship on a transpacific line.
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